Linear Release on Edge of Slab - Etabs or Robot
Linear Release on Edge of Slab - Etabs or Robot
(OP)
Hi Everybody
Im new in Etabs,
I'd like to define a linear release on edge of slab, for example: conection of slab with wall to be pinned, not fixed,
With Robot Millennium this is posible and very easy,
is this posible in Etabs or SAP
regards
Im new in Etabs,
I'd like to define a linear release on edge of slab, for example: conection of slab with wall to be pinned, not fixed,
With Robot Millennium this is posible and very easy,
is this posible in Etabs or SAP
regards





RE: Linear Release on Edge of Slab - Etabs or Robot
RE: Linear Release on Edge of Slab - Etabs or Robot
you idea is correct
i dont know what will hapen with bending moments in slab,(moment values in case of pinned edge - and moment values in case of wall modeled as membrane - dhe values o bending moments in slab must be same in to cases of modeling)
i will try it
RE: Linear Release on Edge of Slab - Etabs or Robot
sory for my english
RE: Linear Release on Edge of Slab - Etabs or Robot
RE: Linear Release on Edge of Slab - Etabs or Robot
zstone/drile007, let us know what you find. I'd be curious to learn for myself from your experience. Good luck.
RE: Linear Release on Edge of Slab - Etabs or Robot
I think that this kind of assignements doesn't describe real behaviour of the wall state.
RE: Linear Release on Edge of Slab - Etabs or Robot
should this not work if you define walls as shell elements and plates as membrane elements????
RE: Linear Release on Edge of Slab - Etabs or Robot
RE: Linear Release on Edge of Slab - Etabs or Robot
Such (membrane) elements don't have any stiffness perpendicular to their own plane, or with the other words; they can't "possess" any moments because their inertia moment is zero. Furthermore, they can't "resist" to any force perpendicular to their own plane.
And what happened in dynamic analysis? When we mesh the wall we automatically add mass at each wall node. When we add horizontal accelerations (response spectra) we got horizontal forces perpendicular to walls in each node (mass x acceleration = force). Since wall is very soft to forces perpendicular to their own plane, we got huge displacement (mode shapes) perpendicular to their own plane.
I hope that I didn't miss the point and I use the right words since my mother language isn't English.
To avoid this problem I do what civilhak suggest, I define walls as shell elements and plates as membrane elements!
RE: Linear Release on Edge of Slab - Etabs or Robot
ZStone: Why don't you ask CSI? It usually takes them up to 1/2 hr ro reply.
Cheers,